Has anyone tested that exact blue logitech mouse with the BLACK Icemat instead of transparent? My gues is it would work better on the black one because of the sensor that can't get the light through the icemat while the transparent is ...well, transparent

and CAN get through the icemat. Conclusion, the sensor doesn't absorb all the light that is reflected by the icemat which is needed to calculate it's positions. So most light get's somewhere else... man weird story..